Me ajudem por favor leiam tudo
Boteo como matemática pq n achei português mas é de português

2y= 3 2 x−2 y = − 1 3 x + 1 y=− 3 1 x+1

Tim's phone service charges $26.39 plus an additional $0.21 for each text message sent per month. if tim's phone bill was $31.64, which equation could be used to find how many text messages, x, tim sent last month?

A33.33 percent decrease followed by a 50% increase. greater or larger that original amount?